Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 4309523 found under Armor Set Supplemen by Demmer Corp. The National Stock Number assigned to this part is 2540015325636, and the Federal Supply Class is 2540 Vehicular Furniture And Accessories. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 4309523.